How addictive can pornography be?

Hi. I wanted to ask for your advice... does it make sense to stay in a relationship with a guy who is addicted to porn and masturbation? We’ve been together for two years. There have been plenty of ups and downs, but for over six months now—ever since his addiction came to light—I haven't known what to do. Our intimacy is suffering terribly because of his addiction; when he prefers to satisfy himself, he has no desire for sex with me later on. I checked his phone history a while back; if I hadn't, I’d probably still be blaming myself for our problems in the bedroom. Ever since porn became so important to him—and essentially brainwashed him—he doesn't even want to cuddle or talk... nothing. He just wants to be left alone. I try to talk to him, but he doesn't see a problem. I have needs too, which I have to bottle up inside... I care about him, because he’s supported me many times when I needed it. But because of the porn—and likely the dopamine hits—I feel like he doesn't need me anymore. Guys, is anyone else dealing with this? What do you think?